Gou Is Collecting Offspring in the Underworld

Cultivation to immortality for immortality? You go in, bury it in the soil, and you will live forever! Why is your land so gloomy? Isn't it buried as a grave? Are you a fairy or a ghost? Can't I just be a human being? Those who want to live forever will enter my underworld and live as long as heaven and earth with me! Martial arts is not as good as immortality? As everyone knows, the peak of martial arts can also kill immortals! Is cultivating an immortal a dead end? Is there only one person out of ten who has spiritual roots? Then come to the underworld and practice martial arts with me! First defend a home, then occupy a city, calm down the troubled times, and then follow me to conquer the world! Seize the sun! Let the underworld grow and be reborn in the pure land! Gou collects offspring in the underworld, technology integration + national martial arts + immortals, gods, demons and demons Farming novel, non-systematic, slightly harem.